<template>
	<el-row class="login-container">
		<el-col :lg="16" :md="12" class="left">
			<div>
				<div>欢迎光临</div>
				<div>此站点是《vue3 + vite实战基础框架开发》的演示项目</div>
			</div>
		</el-col>
		<el-col :lg="8" :md="12" class="right">
			<h2 class="title">欢迎回来</h2>
			<div>
				<span class="line"></span>
				<span>账号密码登录</span>
				<span class="line"></span>
			</div>
			<el-form ref="formRef" :model="form" :rules="rules" class="w-[250px]">
				<el-form-item prop="username">
					<el-input v-model="form.username" clearable placeholder="请输入用户名">
						<template #prefix>
							<el-icon>
								<User />
							</el-icon>
						</template>
					</el-input>
				</el-form-item>
				<el-form-item prop="password">
					<el-input v-model="form.password" type="password" clearable show-password placeholder="请输入密码">
						<template #prefix>
							<el-icon>
								<Lock />
							</el-icon>
						</template>
					</el-input>
				</el-form-item>
				<el-form-item> 
					<el-button class="w-[250px]" round color="#626aef" type="primary" :loading="loading" @click="onSubmit">登录</el-button>
				</el-form-item>
			</el-form>
		</el-col>
	</el-row>
</template>

<script setup>
	import { ref, reactive, onMounted, onBeforeUnmount } from 'vue'
	import { toast } from "~/composables/utils"
	import { useRouter } from 'vue-router'
	import { useStore } from 'vuex'
	
	const router = useRouter()
	const store = useStore()
	
	// do not use same name with ref
	const form = reactive({
		username: 'admin',
		password: 'admin'
	})

	const rules = {
		username: [{
			required: true,
			message: '用户名不能为空',
			trigger: 'blur'
		}],
		password: [{
			required: true,
			message: '密码不能为空',
			trigger: 'blur'
		}]
	}
	const formRef = ref(null)
	const loading = ref(false)

	const onSubmit = () => {
		formRef.value.validate((valid) => {
			if (!valid) return false;
			loading.value = true
			store.dispatch("login", form).then((res) => {
				toast('登录成功')
				router.push("/")
			}).finally(() => {
				loading.value = false
			})
		})
	}
	
	// 监听回车事件
	function onKeyUp(e) {
		if(e.keyCode == 13) {
			onSubmit()
		}
	}
	
	// 添加键盘监听
	onMounted(() => {
		document.addEventListener("keyup", onKeyUp)
	})
	// 移除键盘监听
	onBeforeUnmount(() => {
		document.removeEventListener("keyup", onKeyUp)
	})
	
	
	
	
</script>

<style scoped>
	.login-container {
		@apply min-h-screen bg-indigo-500;
	}

	.login-container .left,
	.login-container .right {
		@apply flex items-center justify-center;
	}

	.login-container .right {
		@apply bg-light-50 flex-col;
	}

	.left>div>div:first-child {
		@apply font-bold text-5xl text-light-50 mb-4;
	}

	.left>div>div:last-child {
		@apply text-gray-200 text-lg;
	}

	.right .title {
		@apply font-bold text-3xl text-gray-800 mb-2;
	}

	.right>div {
		@apply flex items-center justify-center my-5 text-gray-300 space-x-2;
	}

	.right .line {
		@apply h-[1px] w-16 bg-gray-200;
	}
</style>